Ventilating fan



- Jilly .15 1-924. I 1,501,201 L. A. cATEs VENTILATING FAN Filed Dec. 8, 1922 3 Sheets-Sheet 1 INVENTOR.

A TTORNE Y.

July 15 1924.

L. A. GATES VENTILA'I'ING FAN Filed Dec. 8, 1922 3 Sheets-Sheet 2 L. fl. Gfs: INVENTOR Wi'fi'msses:

ATTORNEY.

July 15 1924. 1 1 1,501,201

L. A. CATES VENTILATING FAN Filed Dec. 8, 1922 3 Sheets-Sheet 3 INVENTOR.

A TTORNE Y.

74 2 772 55 as: I

Patented July 15, 1924.

UNITED STATES,

PATENT OFFICE.

..... ia .1ea .aae were we s awes m lica'tioii invention relatesto. improvements in and has for the. primary object thereoffthe provisionof suclra device that is adapted to be mounted within a'room, and

perferably upon the ceiling thereof, the- [blades'of the fanfbeing 's'o shaped andIso disposed, as tocontinu'ously circulate the air within' the room, thereby properly ventilat- 1 ingthe room";

"XX {further object of the invention resides in the provision of sucha-fan, that is com par'atively slinipl'e o'f const uction, and

'"hi'glilyielficientfof operation. 'T he nature and advantages ofthe invennot will be'better' understood when-the following detailed desc'riptionflis read inconnection with the accompanying drawings, the invention residing in the construction, comhinatiomand arrangement of parts as claimed 1 5111 the drawings forming part of thisapplication, like numerals of reference indicate :siinilar parts in the several views, and

wherein:

' -"-"Figure 1- is an elevational view of In y'improved fan, the same beingshow-n as supported upon the ceiling-of a room. A

5 *Figure 2 is a cross sectional View of my device taken on a line slightly above the upper end of the fan blades.

'Fignre 3 is a transverse cross sectional view iipon the line 33 of Figure 1, and lookin'g downwardly in the direction of the "arrows.

Figure 4- is a plan view of a blank form fronrjwhich my blades are formed.

45 Figure 5- is a longitudinal cross sectional View taken upon the line 5-5 of Figure 1 and r Figure 6- is a fragmentary cross sectional view, 'showing an improved} manner of connecting the lower enfds 'oii the blades to their support. I

-With particular-referencetotthedrawings,

my device contemplates the provision of ,a

motor 1, which may be, and preferably is, of thejelectrictype. Thismmotor is' ad'apteil tob'e su pportedrupon the ceiling .of a, r' ooin through the instrumentality' .of a bracke 2 securedtothe upperend ofthe motohand having foutwardly; bent ends 13, providedwith openings for receiving fastening 1 means A.

The power shaft ..-5 of the motor 11, has-the upper end of a pendentv tube secured; theretofby a set screw or like fasteningmeansfi'. Secured-tothis tube in a manner hereinafter described, are three 'equi-distantly Ispacejd fan blades 7. These blades are disposed; at an angle --with respect to the vertical ,gtjxis of-the tube 6, and are -rotated on their axes so that the plane .of eachbladeeis .altilan angle to a radial-line frointhe tube -6, the

- inner edge of eachxblade. adjacent. the lower end thereof having an .ear:i 8, fo1:n' 1 ed v thereon, which ear is adapted tobe curved or bent around the adjacent lportiionflof the tube :6, and to be securedthereto .by alQSet screw- 9, each ear being provided with [an opening as more clearly. shown in Figure 4,

"for this purpose.

;The blades 7 diverge outwardly from the tube '6,-towards their upper .ends", and are furthersecured to the tube by? rods 10. -The outer end of each of the rods is. soldered or riveted to the rear 'surface'ofthe blades 7, and adjacent the upperend thereof. *The opposite ends of the rods' are secured ina similar manner to-the tube 6, and-asa means 'for further securing the rods to the fan blades, "I provide a laterally extending bracket 11 engaging overeach rod 10, the

blades at this point being (llStlilCUfiQ'Ol'llthe 'rods in a manner andifOrpurposes hereinafter described.

Each blade7 is formedv fromasheet metal blank, of ashape substantially, as. shown in "Figure 4C. Aswwillbe seen, these blades are in the front surfaces of the blades. The

upper inner. end of each of theseibladesis porting tube 6, and the longitudinal concavity in each of the blades, together with the outwardly extending lipped ends 12, I

whole restaurant.

have found in actual practice that when my fan is rotated, the air will pursue. a course within a room substantially as shown by the arrows in Figure 1. As-shown in this figure, the air will be sucked by the blades, both i upwardly and downwardly therebetween to be forced outwardly at-a point substantially midway the opposite ends of the blades. From the angular arrangement of the blades as clearly illustrated in the drawings, particularlyFigure 1, it. 'will be noted that in the rotation of the same, the air'-will be forced outwardly circumferentially'of the fan and also downwardly relative thereto, so that a direct circulation of air will'result below thesame and over a substantially large area by reason of the direction which the air takes due to the inclination of'the fan blade? in the rotation thereof. The main portion of the air forced outwardlyby the fan will betaken in over the upper ends of the blade from the upper portion or ceiling of the room inwhich the fan is located, whil a small portion of the air willbe taken in at the lower end of the tube 6, which is clearly indicated by the arrows in Figure l. 1

It will be noted that a fan of this type is well suited for use in restaurants and the like for obtaining a circulation of air over a large area. With the'types of fans now used inrestaurants, the air is either forced axially with respect to the axis of rotation of the fan of a-belt which is suspended from the ceiling, or horizontally from the type which is mounted on the side wall, giving a circulation of air in asubstantially small area directly in line with the axis of rotation of the blade. Fans of this type serve to ventilateorcirculatethe, air about one or two tables in the restaurant, but

the air about other or adjacent tables receive practically no circulation'at all, so that there is an unequal circulation of the air in a substantially small area. With the types of fans above described, this unequal circulation is counteracted, and if the fan is used in a restaurant over one table, it will not only circulate the air over that table but will also circulatethe air outwardly relative to the fan to provide an equal circulation over adjacent tables, and thereby cause a more equal circulation over the I I have'shown and described my fan as -comprising three equi-distantly' spaced blades, but it is nevertheless to be understood that any desired number may be provided, and it is also to be understood that other minor changes may be made in the invention without departing from the spirit and scope of the invention as claimed;

What I claim as new is 1. In a fan of the type described, a rotatingsupporting meniber, a plurality of equi-distantly spaced fan blades secured to said supporting member, the said blades diverging outwardly. away from the supporting member towards their upper ends, and the longitudinal axis of the blades extending at an angle to the similar axis ofthe supporting member. a

2.In a fan of the type described, a supporting member, a plurality of equi-distantly spaced fan blades secured to the supporting member and diverging outwardly away from the supporting member towards their upper ends, a forwardly extending lip at the upper inner end of each blade, and means for rotating said supporting member. a 1

3. In a fan of the type described, a supporting' member, a plurality of equi-distantly spaced fan blades secured to said supporting member and having their longitudinal, axis extending at an angle with respect to the similar axis of the supporting member, and being so disposed upon the support ing member as to diverge outwardly therer from at their upper ends, a forwardly extending lip at the upper end of each blade, each blade being further providedv with a longitudinal concavity and means for rotating th said supporting member.

4. An air circulating fan including a-r'otating supporting member, and a plurality of blades mounted thereon, said blades diverging outwardly toward the upper end from said member arranged at an angle to. the

axial plane of the supportingmember: and

having the plane of the blades in angular relation to the corresponding radial lines on the supportingmember.

5. An air circulating fan includingia shaft member extending axiallyffrom the shaft of a motor for supportin said member, a plurality of'blades having one end secured to said shaft member and diverging outwardly therefrom toward the other end and extending in angular relation relative to the axial plane of the shaft member, and a plurality of arms extendingradially from said shaft member having the outer ends secured to the blades. for holding them in spaced ,relation with respect to the shaft member, the plane of the blades being rotatedrelative to said radial arm. I

An air circulating fan including arotatlng supportmg member extending a'xie ally from a motor shaft forming a support therefor, a plurality of tapered blades of the blades for holding said blades in formed at the smaller end with ears adapted their diverging and angular relation to said 10 v for attachment to the supporting member, supporting member, said blades bein also said blades diverging outwardly toward the arranged at an angle to said radia sup- 5 other end thereof and arranged at an angle porting arm.

to the supporting member, and a plurality In testimony whereof I affix my signaof radial arms from said supporting memture.

her and attached to the last mentioned ends LAURENCE A. GATES. 

